Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '639f722c56f95e4c4ee1f720bda7733ce6d5ab263be92e75354ba27c0a8ecf1f' 
  AND token = 'nL0L97PlUKlMo0s6J9vX0EC0Xdl8HW2LUeW98nqFyoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}